Can opener



FIG. 1 is a perspective view of a can opener showing my new design;

FIG. 2 is a left side view thereof, the right side view being a mirror image thereof;

FIG. 3 is front view thereof,

FIG. 4 is a rear view thereof.

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a top view thereof. 

The ornamental design for a can opener, as shown and described. 